Type:Ground: Ground STAB; Immune to all electrical attacks, can Dig through almost any substance, Evasive Digging reduced from 3 per action Energy Cost to 2 per action, superior senses in darkened cave surroundings.Rock: Rock STAB; reduce damage from all special attacks by two (2) Base Attack Power during Sandstorm. Able to use Sand Tomb without losing focus.

Abilities:Rock Head: (Innate) This Pokemon’s hard body prevents it from taking recoil damage from moves such as Double-Edge, Flare Blitz, and Head Smash.LightningRod: (Innate) These Pokemon naturally attract electricity to themselves and away from partners in double battles. When struck with an Electric attack, they tranfer the energy into their body, using it to increase their Special Attack by one (1) stage. This boost is maintained at the end of each round.Reckless (DW): (Innate) TThis Pokemon has an innately aggressive nature that lets it use all-out attacks with recoil more effectively. Recoil attacks from this Pokemon have two (2) more Base Attack Power, and recoil percentage is unaffected.

Type:Flying: Flying STAB; immunity to Ground attacks except under the effects of Smack Down and Gravity, even for ground-based flying Pokemon. Will always hit foes with Dig (except other Flying types) and Dive. Cannot be hit by Dive unless the attacking Pokemon has a size class greater than four (4). Immune to Spikes and Toxic Spikes. Enhanced aerial mobility. Superior senses in open air arenas.Rock: Rock STAB; reduce damage from all special attacks by two (2) Base Attack Power during Sandstorm. Able to use Sand Tomb without losing focus.

Abilities:Rock Head: (Innate) This Pokemon’s hard body prevents it from taking recoil damage from moves such as Double-Edge, Flare Blitz, and Head Smash.Pressure: (Innate) This Pokemon’s presence fills the air with intense anxiety, and any damaging or status attack launched at this Pokemon costs the opposing Pokemon two (2) more energy to perform.UnNerve (DW): (Innate) The Pokemon's presense causes immense tension in the opponent, preventing them from eating a held Berry. Natural Gift may still be used.

Onix [Iwark] (M)Nature: Adamant (+1 Atk, -1 SpA)Type: Rock/GroundRock: Rock STAB; Take 2 less damage from all special attacks during Sandstorm. Able to use Sand Tomb without losing focus.Ground: Ground STAB; Immune to all electrical attacks, can Dig through almost any substance, Evasive Digging reduced from 3 per action Energy Cost to 2 per action, superior senses in darkened cave surroundings.

Abilities:
Rock Head: (Innate) This Pokemon’s hard body prevents it from taking recoil damage from moves such as Double-Edge, Flare Blitz, and Head Smash.Sturdy: (Innate) This Pokemon’s body is solidly constructed, reducing the Base Attack Power from an opponents incoming attacks by one (1). The effect is amplified on OHKO Moves, which are reduced by ten (10) Base Attack Power.Weak Armor (DW): (Can be Enabled) The Pokemon can loosen its worn defensive armor so that it will break off when an opponent uses a contact attack, reducing the Pokemon's Defense and increasing their Speed by one (1) stage for each hit.

Revenankh [] MNature: Relaxed (+1 Def, -15% Speed, -10% Evasion)Type: Ghost/FightingGhost: Ghost STAB; brief intangibility that nullifies Normal and Fighting-type attacks. Can move through walls for a brief period of time but must remain in motion. Superior senses in low light and inside dark buildings. Have no vision reduction in hazes.Fighting: Fighting STAB; ignore weight restrictions of throwing/grappling moves. Superior reaction time in close quarters.

Abilities:Shed Skin: (Innate) This Pokemon regularly sheds its skin and any impurities contained in its body. If afflicted with a status condition, this Pokemon has a 33% chance of removing all status conditions at the end of a round.Air Lock: (Innate) This Pokemon releases immense barometric pressure, clearing the weather in the arena and preventing the effect of weather moves and abilities from taking place.Mummy (DW): (Innate) This Pokemon's skin has a lasting curse on it. When struck by an opponent's contact move, the curse transfers, changing the opponent's ability(ies) to Mummy for the next six (6) actions.

Here in the strange and unusual (and vaguely described) "Simple Arena" two battlers meet to... well battle.
Leethoof sends out two Rock Types, Aerodactyl and Rhyhorn. Elevator Music sends out a rock type of his own, Rhyhorn, as well as Revenankh.

Revenankh, feeling outcast retreats into himself, Protecting himself from harm (as well as Supersonic noises). Rhyhorn gets his horn spinning and warmed up for a Drill Run which hits Onix for nice damage. But the giant creature is not worried about that and goes after Aerodactyl with a Smack Down+Rock Blast Combo. The attack hits 5 times too; as a result Aerodactyl doesn't just get knocked out of the sky but falls through the ground, straight through the centre of the earth and arrives in China!
Luckily he has 150 speed and manages to make his way back to the battlefield just in time to... do nothing! Sky Drop fails without the ability to fly, leaving Aerodactyl looking a little silly. What's worse is a disapproving Glare from Revenankh has paralysed the poor thing and made its impressive speed... somewhat less impressive. Rhyhorn hits the ghost with Stone Edge as an act of revenge but it doesn't seem to be very effective.
Onix, having cooled off from his combo and now the fastest guy in town pummels that position's former holder with Rock Blast, hitting 4 times, and Revenankh backs him up with Drain Punch! Rhyhorn attacks Onix with another Drill Run while Aerodactyl uselessly cramps up, meaning he has achieved literally nothing this round.
I can see why Leethoof needs to train him.

Aerodactyl tries to get his wings moving to generate and Earthquake but a simialr maneouvre from Onix and an Arm Thrust from Revenankh ko him (only just, .26 less damage and it would have survived)! Rhyhorn, enraged at the loss of a friend, rampages about generating his own Earthquake!
And then it all repeats itself from there earthquakes everywhere. Revenankh has a little more flair, throwing in a drain punch between his boringness. The Arm Thrust gets 2 hits, meh.